Specifications

RoadRunner USERS GUIDE
66
can place calls
or receive
calls, not both.
properly. 2. Contact service provider and
check provisioning. See
Appendix D.
RoadRunner
can only
connect
locally (North
American
operation)
—No long distance
carrier specified when
ordering ISDN
service.
1. Contact service provider and
specify a long distance carrier.
You may have to open an
account with the selected carrier.
If your RoadRunner connects and frames, but the line drops after time
(several minutes to several hours) this may be a problem with the ISDN
service or with the NT1 (North American operation). We have seen this
before, we have even replaced codecs, terminal adapters, and NT1’s,
and except for a few instances where replacing the NT1 cleared the
problem, it always turns out to be ISDN related. Remember that it is
highly unlikely that a codec works sometimes and not other times. We
have also seen these symptoms when using certain older terminal
adapters, either internal or external, which have software that is
incompatible with certain ISDN configurations.
If replacing the NT1 does not clear the problem, contact your service
provider, They will perform a BERT test, which will most likely show
no errors. Unfortunately, a standard BERT test is only run for 15
minutes, and will only show ‘background’ errors, which do not affect
the performance of the RoadRunner. Burst errors, or errors on the
signaling channel (the ‘D’ channel) will cause problems, and are not
found easily. Ask your service provider to run a BERT test for at least
two hours, overnight if possible (to find burst errors), and to test the
whole BRI, including the ‘D’ channel.
Unfortunately, any tests performed locally will only test the condition
of your local loop and central office. If the problem is at the other end
of the connection, with an intermediate central office, or with your
long-distance company, your local service provider cannot help. Do
not attempt to use our ‘Music Line’ as a troubleshooting tool, since this
connection is automatically terminated after 15 minutes. Do try using a
different long distance service provider, this has worked clearing the
problem in several instances. You can also ask your service provider or
MUSICAM USA for a loopback number.
You can sectionalize the problem yourself which will help when calling
your service provider. Dial from your first line to your second line and